Nucleon scalar and tensor couplings from lattice QCD at the physical points
We present results for the axial, scalar and tensor isovector-couplings (gA, gS and gT) of the nucleon obtained from 2+1 flavor QCD with the physical light quark masses (Mπ = 135 MeV). Our calculations are performed at a single lattice spacing of 0.085 fm, but with two large volumes of (10.9 fm)4 an...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2022-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2022/18/epjconf_confxv2022_06009.pdf |
| _version_ | 1797951190308225024 |
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| author | Tsuji Ryutaro Aoki Yasumichi Ishikawa Ken-Ichi Kuramashi Yoshinobu Sasaki Shoichi Shintani Eigo Yamazaki Takeshi |
| author_facet | Tsuji Ryutaro Aoki Yasumichi Ishikawa Ken-Ichi Kuramashi Yoshinobu Sasaki Shoichi Shintani Eigo Yamazaki Takeshi |
| author_sort | Tsuji Ryutaro |
| collection | DOAJ |
| description | We present results for the axial, scalar and tensor isovector-couplings (gA, gS and gT) of the nucleon obtained from 2+1 flavor QCD with the physical light quark masses (Mπ = 135 MeV). Our calculations are performed at a single lattice spacing of 0.085 fm, but with two large volumes of (10.9 fm)4 and (5.5 fm)4. The configurations are generated by the PACS Collaboration with nonperturbatively 𝒪(a) improved Wilson quark action and Iwasaki gauge action. The result of gA is a good indicator for determination of gS and gT with respect to accuracy and precision. Our result of gA well reproduces the experimental value within a statistical error of less than 2%. As for gS and gT, we compute the renormalization constants at the scale of 2 GeV in the ̅M̅S scheme through the RI/SMOM(γμ) intermediate scheme, and then obtain gS = 0.927(83)stat(22)syst and gT = 1.036(6)stat(20)syst. |
| first_indexed | 2024-04-10T22:26:42Z |
| format | Article |
| id | doaj.art-cdb927ed4179439a864c466cb6ec4ec7 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-04-10T22:26:42Z |
| publishDate | 2022-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-cdb927ed4179439a864c466cb6ec4ec72023-01-17T09:14:37ZengEDP SciencesEPJ Web of Conferences2100-014X2022-01-012740600910.1051/epjconf/202227406009epjconf_confxv2022_06009Nucleon scalar and tensor couplings from lattice QCD at the physical pointsTsuji Ryutaro0Aoki Yasumichi1Ishikawa Ken-Ichi2Kuramashi Yoshinobu3Sasaki Shoichi4Shintani Eigo5Yamazaki Takeshi6Department of Physics, Tohoku UniversityRIKEN Center for Computational ScienceCore of Research for the Energetic Universe, Graduate School of Advanced Science and Engineering, Hiroshima UniversityCenter for Computational Sciences, University of TsukubaDepartment of Physics, Tohoku UniversityCenter for Computational Sciences, University of TsukubaCenter for Computational Sciences, University of TsukubaWe present results for the axial, scalar and tensor isovector-couplings (gA, gS and gT) of the nucleon obtained from 2+1 flavor QCD with the physical light quark masses (Mπ = 135 MeV). Our calculations are performed at a single lattice spacing of 0.085 fm, but with two large volumes of (10.9 fm)4 and (5.5 fm)4. The configurations are generated by the PACS Collaboration with nonperturbatively 𝒪(a) improved Wilson quark action and Iwasaki gauge action. The result of gA is a good indicator for determination of gS and gT with respect to accuracy and precision. Our result of gA well reproduces the experimental value within a statistical error of less than 2%. As for gS and gT, we compute the renormalization constants at the scale of 2 GeV in the ̅M̅S scheme through the RI/SMOM(γμ) intermediate scheme, and then obtain gS = 0.927(83)stat(22)syst and gT = 1.036(6)stat(20)syst.https://www.epj-conferences.org/articles/epjconf/pdf/2022/18/epjconf_confxv2022_06009.pdf |
| spellingShingle | Tsuji Ryutaro Aoki Yasumichi Ishikawa Ken-Ichi Kuramashi Yoshinobu Sasaki Shoichi Shintani Eigo Yamazaki Takeshi Nucleon scalar and tensor couplings from lattice QCD at the physical points EPJ Web of Conferences |
| title | Nucleon scalar and tensor couplings from lattice QCD at the physical points |
| title_full | Nucleon scalar and tensor couplings from lattice QCD at the physical points |
| title_fullStr | Nucleon scalar and tensor couplings from lattice QCD at the physical points |
| title_full_unstemmed | Nucleon scalar and tensor couplings from lattice QCD at the physical points |
| title_short | Nucleon scalar and tensor couplings from lattice QCD at the physical points |
| title_sort | nucleon scalar and tensor couplings from lattice qcd at the physical points |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2022/18/epjconf_confxv2022_06009.pdf |
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